jcarvalho wrote:sorry for asking, but why messing with keys and auto-fire when things like demos: nocooper 1984, atari ste 20th anniversary demo and games like turricanII dont work?basic things like a proper fpga implementation are left behind

That's because the FPGA cores and the firmware are different projects with different contributors, and need different skills, knowledge, and motivation to work on them.

sorry @jcarvalho, but you often complain about how the MiST is not correctly finished and such. It's an open source development made with the passion of some few (unpaid) developpers. We must be very grateful about what was already made. I'd be tempted to say if Turrican II is not working correctly on the Atari ST core, then use the Amiga one, I've just played it until after the 1st boss, and it was gorgeous and perfect! Yeah, on some aspects, some emulators are "better", but on other the MiST is better, that's it. You have almost real original hardware with MiST, but there is maybe 2% which is not perfect (maybe also because of undocumented features) and that prevents some demos to run.